The texture of soil determines its porosity and permeability.
I think the silt particle size should be 0.002-0.05 mm instead of 0.05-0.002mm . I stand to be corrected.
in this module we learn about soil texture and its characteristics.
what are the three main of rock grains found in soil.
Los suelos se diferencian por sus propiedades físicas, químicas y biológicas.
whew, the soil module is a challenge for those non-science studie(s)
el suelo se compone mayormente de sustancias inorgánicas, hay tres tipo de grano de roca los cuales son: arena, limo y arcilla. dependiendo el tipo de suelo, este puede retener agua o no según su estructura que esta tiene que ver con su estructura.
Soil character is the function of parent rock.
Which soil structure is the best and the impact of organic matter is it important?
Most soil consists of weathered inorganic rock material. The relative amounts of different sizes and types of rock particles or grains determines the texture of the soil. The three main types of rock grains found in soil are: sand, silt and clay.
Sand grains have the largest grain sizes (0.05 - 2.0 mm) of the three. Silt particles are fine-grained (0.05-0.002 mm) and clay particles are very fine-grained (less than 0.002 mm). Sand grains give soil its gritty feel, and clay particles make it sticky.
Soils are named according to where their sand silt and clay composition plots on a soil structure triangle. Various regions of the triangle are given different names. A typical loam soil is made up of about a 20:40:40 mixture of clay, silt and sand. If the percentage of sand is a little higher, the soil is called a sandy loam, and if the percentage of silt is a little higher the soil is a silty loam.
The texture of the soil determines its porosity and permeability.
Soil porosity is a measure of the volume of pore spaces between soil grains per volume of soil and determines the water and air (oxygen) holding capacity of the soil. Coarse grains with large pores provide better aeration and fine grains with small pores provide good water retention. The average pore size determines the soil permeability or ease with which water can infiltrate the soil.
Sandy soils have low porosities and high permeabilities (i.e. water is not retained well, but flows through them easily, and aeration is good). On the other hand, clay soils have high porosities and low permeabilities (i.e. water is retained very well, but does not flow through it easily and aeration is poor).
Soil texture is important in determining what type of vegetation thrives on a particular soil. The soil structure or "tilth" is related to the soil texture. Soil tilth describes how the various components of the soil cling together into clumps. It is determined by the amount of clay and humus in the soil.
The physical and chemical properties of clay and humus enable them to adhere to other particles in the soil, thus forming large aggregates. These same properties also help protect the soil from nutrient leaching. Soils lacking clay and humus are very loose and are easily blown or shifted by the wind (i.e. sand dunes in the desert).
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